1 files changed, 56 insertions, 0 deletions
diff --git a/predicate-search/src/test/java/com/yahoo/search/predicate/index/conjunction/ConjunctionIdIteratorTest.java b/predicate-search/src/test/java/com/yahoo/search/predicate/index/conjunction/ConjunctionIdIteratorTest.java
new file mode 100644
index 00000000000..d324faec50a
--- /dev/null
+++ b/predicate-search/src/test/java/com/yahoo/search/predicate/index/conjunction/ConjunctionIdIteratorTest.java
@@ -0,0 +1,56 @@
+// Copyright 2016 Yahoo Inc. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
+package com.yahoo.search.predicate.index.conjunction;
+
+import com.yahoo.search.predicate.SubqueryBitmap;
+import org.junit.Test;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertTrue;
+
+/**
+ * @author bjorncs
+ */
+public class ConjunctionIdIteratorTest {
+
+    @SuppressWarnings("PointlessBitwiseExpression")
+    @Test
+    public void require_that_next_returns_skips_to_correct_value() {
+        // NOTE: LST bit represents the conjunction sign: 0 => negative, 1 => positive.
+        int[] conjunctionIds = new int[]{
+                0 | 1,
+                2 | 0,
+                4 | 0,
+                6 | 1,
+                8 | 1,
+                10 | 0};
+
+        ConjunctionIdIterator postingList =
+                new ConjunctionIdIterator(SubqueryBitmap.ALL_SUBQUERIES, conjunctionIds);
+
+        assertEquals(1, postingList.getConjunctionId());
+        assertEquals(1, postingList.getConjunctionId()); // Should not change.
+
+        assertTrue(postingList.next(2));
+        assertEquals(2, postingList.getConjunctionId());
+        assertTrue(postingList.next(0)); // Should not change current conjunction id
+        assertEquals(2, postingList.getConjunctionId());
+
+        assertTrue(postingList.next(6 | 1)); // Should skip past id 4
+        assertEquals(7, postingList.getConjunctionId());
+
+        assertTrue(postingList.next(8)); // Should skip to 9
+        assertEquals(9, postingList.getConjunctionId());
+
+        assertTrue(postingList.next(10 | 1));
+        assertEquals(10, postingList.getConjunctionId());
+
+        assertFalse(postingList.next(12)); // End of posting list
+    }
+
+    @Test
+    public void require_that_subquery_is_correct() {
+        ConjunctionIdIterator iterator = new ConjunctionIdIterator(0b1111, new int[]{1});
+        assertEquals(0b1111, iterator.getSubqueryBitmap());
+    }
+}